CN104011814B - Magnetic field shielding piece and its manufacture method and wireless charger reception device - Google Patents
Magnetic field shielding piece and its manufacture method and wireless charger reception device Download PDFInfo
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- CN104011814B CN104011814B CN201280062847.1A CN201280062847A CN104011814B CN 104011814 B CN104011814 B CN 104011814B CN 201280062847 A CN201280062847 A CN 201280062847A CN 104011814 B CN104011814 B CN 104011814B
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- wireless charger
- magnetic field
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0075—Magnetic shielding materials
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249955—Void-containing component partially impregnated with adjacent component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249955—Void-containing component partially impregnated with adjacent component
- Y10T428/249956—Void-containing component is inorganic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2848—Three or more layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/32—Composite [nonstructural laminate] of inorganic material having metal-compound-containing layer and having defined magnetic layer
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Signal Processing (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Soft Magnetic Materials (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
The present invention relates to by when charger function is realized in portable terminal etc. in noncontact (wireless) mode produced AC magnetic field prevent from producing the bodies such as portable terminal influence, and the outstanding wireless charger of power transmission efficiency is with magnetic field shielding piece and its manufacture method and utilizes wireless charger reception device of the wireless charger with magnetic field shielding piece.It is a feature of the present invention that including：At least one layer of thin plate magnetic piece; formed by the amorphous band for being separated into multiple shreds, diaphragm, the one side of above-mentioned thin plate magnetic piece is bonded in by the first tack coat; and two-sided tape, the another side of above-mentioned thin plate magnetic piece is bonded in by being arranged at the second tack coat of one side；Gap between above-mentioned multiple shreds is filled by a part for above-mentioned first tack coat and the second tack coat, so that above-mentioned multiple shred insulation.
Description
Technical field
With magnetic field shielding piece and its manufacture method and the wireless charger magnetic field is utilized the present invention relates to wireless charger
The wireless charger reception device of piece is shielded, especially, is related to for preventing in equipment such as portable terminals, with noncontact (nothing
Line) mode realizes that body generation of the AC magnetic field produced during charger function on portable terminal etc. influences, and electricity
The outstanding wireless charger of power efficiency of transmission is with magnetic field shielding piece and its manufacture method and utilizes wireless charger magnetic field screen
Cover the wireless charger reception device of piece.
Background technology
The charging method for the secondary cell that the electronic equipments such as portable terminal, video camera are carried has two kinds, respectively connects
Touch charging modes and contactless charging modes.Contact charging modes refer to, make the electrode of current-collecting device directly with power supply
The contact electrode of device, in the way of being charged by this.
For contact charging modes, because its apparatus structure is simple, thus generally make in field is widely applied
With, but as electronic equipment tends to miniaturization and lightweight, the weight of various electronic equipments, cause the electrode of current-collecting device
Contact pressure between the electrode of electric supply installation is not enough, so that the problems such as producing charging bad (charging error).Also, due to two
The poor heat resistance of primary cell, thus need to prevent that battery temperature from rising, and should be noted the design of circuit, with prevent overdischarge and
The generation of overcharge.In order to solve this problem, recently just in studying non-contact type charging modes.
Contactless charging modes refer to, by setting coil to utilize electromagnetism in the both sides of current-collecting device and electric supply installation
The charging modes of sensing.
Contact-less charger is using FERRITE CORE as magnetic core, the convolute coil around above-mentioned FERRITE CORE, with this
To realize miniaturization.Also, in order to realize miniaturization and be thinned, it is proposed that mixed ferrite powder and amorphous powder carry out shape
Resin substrate, and in the technology of above-mentioned resin substrate potted coil etc..But, if ferrite is processed into thin shape, easily
Fracture, and impact resistance is weak, so that the problem of in the presence of making to be produced defect by electric system because of the whereabouts of equipment or conflict etc..
Also, the thinning tendency of electronic equipment is catered to, in order to realize the slimming of power receiving section point, online circle printing is employed
The planar coil of brush metal dust paste.Propose using planar coil and magnetic piece to strengthen the structure combined.At this
In the structure being suggested a bit, magnetic (magnetic piece) combination between first coil and the second coil has been used as being used to strengthen
Core.
On the other hand, when the change of power transmission speed is big, in addition to the combination between adjacent transformer, above-mentioned transformer
Circumferential component also easily produces the defect because of caused by heating.That is, in the case of using planar coil, the magnetic of planar coil is passed through
Flux and substrate of device interior etc. are connected, so as to cause the inside of device to be sent out because of the vortex flow produced electromagnetic induction
Heat.As a result, there are problems that causing the charging interval because larger electric power can not be sent.
In order to solve this problem, magnetic (magnetic piece) has also been used as to the shielding material relative to the back side
(shielding member).For obtaining sufficient shield effectiveness, the magnetic conductivity of magnetic (magnetic piece) is big and area and
Thickness is bigger, more results in more effective shield effectiveness.
Generally, the magnetic such as polymer sheet by amorphous band, ferrite and including magnetic is used as this magnetic field shielding piece.
Magnetic field focusing effect shows as armoured magnetic field and improves additional function, performance, is arranged by the quality of magnetic field focusing effect, according to
Secondary amorphous band, ferrite and the polymer sheet including magnetic high for magnetic conductivity.
In the current-collecting device of conventional non-contact power charging system, in order to strengthen the combination for improving power transmission efficiency,
In order to improve the shielding for suppressing heating, in the one side opposite with first coil side, i.e., match somebody with somebody on the surface of the second coil
Put the magnetic (magnetic piece) with high magnetic permeability and large volume.According to this configuration, because the inductance of first coil changes
Greatly, and because of the relative position relation between magnetic and first coil, the condition of work that there is resonance circuit does not meet and can sent out
The problem of waving the condition of resonance of abundant effect.
Following technology is proposed in Korean Patent Laid-Open the 10-2010-31139th (patent document 1)：In order to solve as above
Described the problem of there is provided can improve resonance and can suppress heating current-collecting device, thus, it is possible to use by Denso
The electronic equipment put and become big by the power transmission electric power of electric system, and the charging interval can be shortened.
That is, following technology is proposed in Korean Patent Laid-Open the 10-2010-31139th：In spiral coil (by electricity one
Side spiral coil：Second coil) between secondary cell and between rectifier and above-mentioned spiral coil at least one
Place's configuration includes the composite magnetic body of multiple magnetic pieces (magnetic recording tape), to prevent from power supply side spiral coil (first coil)
The interconnection such as magnetic flux and circuit board and secondary cell of generation, suppresses noise and hair as caused by induced electromotive force (electromagnetic induction)
Heat, and control the inductance variation of first coil that whether is whether there is based on the second coil, come improve by first coil constitute it is humorous
Shake the resonance of circuit, comes effectively to control vibration with this.
Above-mentioned composite magnetic body is set as follows：That is, the first magnetic resistance of the first adjacent with spiral coil magnetic piece is less than
Or equal to 60, the second magnetic resistance for being laminated in the second magnetic piece of the first magnetic piece is more than or equal to 100, (the magnetic of the second magnetic resistance/first
Resistance) value be more than or equal to 1.0.
Polycarbonate resin is bonded in the two sides of the first amorphous band above-mentioned first magnetic is made respectively using tack coat
Property piece, and polycarbonate resin is bonded in using tack coat the two sides of non-magnetic conductivity bigger the second amorphous band relatively respectively
To be made after the second magnetic piece, by tack coat between the first magnetic piece and the second magnetic piece, to be bonded to one.
On the other hand, in the case of ferrite sheet or polymer sheet including magnetic, compared with amorphous band, magnetic conductivity is slightly
It is micro- low, it is desirable in the case of the performance for improving this low magnetic conductivity, the amorphous band phase with the thin plate as tens of um thickness
Than, thickness is thickening, thus with the problem of being difficult to the thinning tendency for catering to terminal.
Also, in the case of the high amorphous band of magnetic conductivity, because band sheet is as sheet metal, thus not to thickness
Burden, if but be applied with the AC magnetic field based on 100kHz frequencies for power transmission to amorphous band, produce because of band
The influence of the vortex flow (Eddy Current) on material surface and decline application function, or when carry out wireless charging when efficiency under
The problems such as drop and heating.
In the case of Co classes or Fe class amorphous bands, sheet resistance can be somewhat improved by being heat-treated, but in order to more
Add and subtract the influence of few vortex flow and carry out in the case of reducing the processing such as fragmentation (Flake) of surface area of band, magnetic conductivity
It is decreased obviously, causes the function as shielding piece to substantially reduce.
Also, in the case of wireless charger, make power transmission to improve the efficiency of charger to greatest extent
Transmitter using contribute to acceptance division match (align) permanent magnet structure it is more, and relatively thin shielding piece by
The D.C. magnetic field of permanent magnet and produce magnetization (saturation) phenomenon, cause hydraulic performance decline, or produce power transmission efficiency drastically
The problem of decline.
Thus, in the past, in order in the case where not influenceed by permanent magnet present shielding character, it is necessary to make the thickness of shielding piece
Degree turns into more than 0.5T, i.e., only thickness is very thick, can maintain high power transmission efficiency, thus is realizing portable terminal
Become larger obstacle during the slimming of end.
The content of the invention
Technical problem
Due to wireless charger the second coil induce voltage according to Faraday's law (Faraday's law) and Lenz
Law (Lenz's law) is determined, thus wants to obtain high voltage signal, the magnetic flux interconnected with the second coil more it is many more
Favorably.The amount of soft magnetic materials included by second coil is more, and the magnetic conductivity of material is higher, and magnetic flux will be bigger.Especially,
Wireless charging device is fundamentally based on non-contacting power transmission, thus wants to make what is formed in the first coil of dispensing device
Radio wave focuses on the second coil of reception device, it is necessary to make the magnetic field shielding piece of the coil of encapsulation second high by magnetic conductivity
Magnetic material is formed.
According to conventional art, wireless charger is film with magnetic field shielding piece, and not yet proposes to solve to cause because of shielding
Heating problem and the solution of wireless charging efficiency can be improved.In this regard, inventors have realized that using amorphous ribbon
In the case of material, even if carrying out fragmentation to band, the reduction amount of inductance (magnetic conductivity) is also few, and as magnetic resistance is greatly reduced,
The quality factor (Q) of second coil will increase, and be achieved in the present invention.
Therefore, the present invention in order to solve conventional art as described above the problem of and propose, its object is to there is provided
Wireless charger magnetic field shielding piece and its manufacture method and the wireless charger of utilization wireless charger magnetic field shielding piece
With reception device, handle to greatly reduce by damaging caused by vortex flow (Eddy Current) by the fragmentation of amorphous band
Lose, thus be shielded from the magnetic field influence of body and the battery generation on portable terminal etc., and increase the quality of the second coil
Factor (Q), outstanding power transmission efficiency is ensured with this.
, can be non-it is a further object of the present invention to provide wireless charger magnetic field shielding piece and its manufacture method
After the fragmentation processing of crystal zone material, binding agent is filled in the seam between the shred of amorphous band by crimping lamination process
Gap, thus prevents moisture penetration, and coats all faces of shred with binding agent (dielectric medium), to make shred mutually insulated
(isolation), to reduce vortex flow, so as to prevent shielding properties from declining.
Another object of the present invention is to magnetic field shielding piece and utilize the wireless charger magnetic there is provided wireless charger
The wireless charger reception device of field shield piece, by the way that the shape for shielding piece is set as and wireless charger reception device
The similar shape of the second coil, to use a small amount of nanocrystalline strip, and with high power transmission efficiency.
The present invention a further object be there is provided wireless charger magnetic field shielding piece and its manufacture method, can with roll up
Fragmentation and lamination process are performed successively to volume method, to realize the shaping of thin slice, so that original thickness of thin slice is maintained, and really
Protect high production rate, cheap manufacturing expense.
The means solved the problems, such as
In order to reach purpose as described above, the present invention provides wireless charger magnetic field shielding piece, it is characterised in that bag
Include：At least one layer of thin plate magnetic piece, is formed, diaphragm by the amorphous band for being separated into multiple shreds, passes through the first tack coat
The one side of above-mentioned thin plate magnetic piece, and two-sided tape are bonded in, is bonded in by the second tack coat for being arranged at one side
State the another side of thin plate magnetic piece；Gap between above-mentioned multiple shreds is by one of above-mentioned first tack coat and the second tack coat
Divide filling, so that above-mentioned multiple shred mutually insulateds (isolation).
According to another feature of the present invention, the present invention provides the manufacture method of wireless charger magnetic field shielding piece, and it is special
Levy and be, including：By on the two sides of the thin plate magnetic piece formed by least one layer of amorphous band adhere to diaphragm and
The two-sided tape of mould release membrance is formed with its exposed surface, the step of to form laminates；By carrying out fragment to above-mentioned laminates
Change is handled, the step of above-mentioned thin plate magnetic piece is divided into multiple shreds；And by having carried out the upper of fragmentation processing
State laminates and carry out lamination treatment, to realize the planarization and slimming of laminates, while the of said protection film will be arranged at
A part for one tack coat and the second tack coat for being arranged at two-sided tape is filled in the gap of above-mentioned multiple shreds, so that above-mentioned
The step of multiple shred mutually insulated (isolation).
According to another characteristic of the invention, the present invention provides wireless charger reception device, for from wireless charger
Dispensing device secondary cell is charged with way of electromagnetic induction, the feature of above-mentioned wireless charger reception device exists
In, including：Second coil, for receiving the wireless high-frequency signal transmitted with way of electromagnetic induction from above-mentioned dispensing device, and
Magnetic field shielding piece, is configured between above-mentioned second coil and secondary cell, is produced for shielding because of above-mentioned wireless high-frequency signal
Magnetic field, while above-mentioned second coil of guiding makes it absorb for performing the wireless high-frequency signal needed for wireless charging function；On
Stating magnetic field shielding piece includes：At least one layer of thin plate magnetic piece, is formed, diaphragm by the amorphous band for being separated into multiple shreds,
The one side of above-mentioned thin plate magnetic piece, and two-sided tape are bonded in by the first tack coat, by be arranged at one side second
Tack coat is bonded in the another side of above-mentioned thin plate magnetic piece；Gap between above-mentioned multiple shreds is by above-mentioned first tack coat and
The part filling of two tack coats, so that above-mentioned multiple shred mutually insulateds (isolation).
The effect of invention
As described above, in the present invention, being handled by the fragmentation of amorphous band, to greatly reduce by vortex flow (Eddy
Current lost caused by), thus be shielded from the magnetic field influence of body and the battery generation on portable terminal etc., and increased
Plus second coil quality factor (Q), outstanding power transmission efficiency is ensured with this.
Also, in the present invention, can be after the fragmentation processing of amorphous band, by crimping lamination process by bonding
Agent is filled in the gap between the shred of amorphous band, thus prevents moisture penetration, and is coated carefully with binding agent (dielectric medium)
All faces of piece, to make shred mutually insulated (isolation), to reduce vortex flow, so as to prevent shielding properties from declining.It is tied
Really, all faces of shred can be coated with binding agent (dielectric medium), amorphous band is aoxidized to prevent moisture penetration, causes
Outward appearance changes and characteristic deteriorates.
Especially, in the present invention, the shape for shielding piece can be set as the shape similar with receiver coil, to use
A small amount of nanocrystalline strip, with high power transmission efficiency, or is presented equivalent power transmission efficiency, and make the thickness of thin slice
Degree is reduced to below 0.3mm.
Also, in the present invention, fragmentation and lamination process can be performed successively in volume to volume method, to realize thin slice
Shaping, so as to maintain original thickness of thin slice, and ensure high production rate, cheap manufacturing expense.
Brief description of the drawings
Fig. 1 is the exploded perspective view for representing the wireless charger magnetic field shielding piece of the present invention；
Fig. 2 is expression according to sectional view of the first embodiment using the example of 1 nanocrystalline strip piece；
Fig. 3 is expression according to sectional view of the second embodiment using the example of 6 nanocrystalline strip pieces；
Fig. 4 and Fig. 5 are respectively the sectional view for the structure for showing diaphragm and two-sided tape used in the present invention；
Fig. 6 is the exploded perspective view for the wireless charger magnetic field shielding piece for representing the third embodiment of the present invention；
Fig. 7 is the process chart for illustrating the manufacturing process of the wireless charger magnetic field shielding piece of the present invention；
Fig. 8 and Fig. 9 are respectively the sectional view for the fragmentation process for representing the laminates of the present invention；
Figure 10 carries out the sectional view of the state of fragmentation processing for expression to the laminates of the present invention；
Figure 11 and Figure 12 are respectively the sectional view for the lamination process for representing the laminates handled through fragmentation of the present invention；
Figure 13 carries out fragmentation processing to the wireless charger of the first embodiment of the present invention for expression with magnetic field shielding piece
The sectional view for the state being laminated afterwards；
Figure 14 a and Figure 14 b are respectively that the magnetic field shielding piece for carrying out not laminated process after fragmentation processing is surveyed through humidity
The amplification after humidity measurement for the magnetic field shielding piece being laminated after the enlarged photograph of examination and the progress fragmentation processing of the present invention is shone
Piece；
Figure 15 thin plate magnetic used in the wireless charger magnetic field shielding piece of the expression fourth embodiment of the present invention
The sectional view of piece；
Figure 16 is vertical applied to the decomposition of the structure of the reception device of wireless charger for the magnetic field shielding piece for representing the present invention
Body figure；
Figure 17 is represents that Figure 16 wireless charger reception device is arranged in battery cover, and and portable terminal
The exploded perspective view for the state being combined；
Figure 18 is to show pair that near-field communication aerial and wireless charger are formed with antenna using flexible printed circuit board
The top view of antenna structure；
The sketch of the efficiency for the shielding piece that Figure 19 is used to test the present invention for expression and the measure structure of temperature characterisitic.
Embodiment
Referring to the drawings and it is described later describe in detail, above-mentioned purpose, feature and advantage can be made definitely, it is thus of the invention
Person of an ordinary skill in the technical field can easily implement the technological thought of the present invention.
Also, during the present invention is illustrated, be judged as can to having illustrated for related known technology of the invention
Can unnecessarily it make in the case that idea of the invention obscures, will description is omitted.
Fig. 1 is represents the exploded perspective view of the wireless charger magnetic field shielding piece of the present invention, and Fig. 2 is expression according to first
Embodiment uses the sectional view of the example of 1 nanocrystalline strip piece.
Reference picture 1 and Fig. 2, the wireless charger magnetic field shielding piece 10 of preferred first embodiment of the invention include：
At least one layer of multi-layered sheet magnetic piece 2, fragment is carried out after being heat-treated to the band of non-crystaline amorphous metal or nanometer crystal alloy
Change is handled, and is separated into multiple shreds 20, and/or is formed with crackle；Diaphragm 1, is bonded in the upper of above-mentioned thin plate magnetic piece 2
Portion；Two-sided tape 3, is bonded in the bottom of above-mentioned thin plate magnetic piece 2；And mould release membrance 4, it is bonded in a detachable fashion above-mentioned
The bottom of two-sided tape 3.
For example, the band of the thin plate formed by non-crystaline amorphous metal or nanometer crystal alloy can be used as into above-mentioned thin plate magnetic piece 2.
Fe classes or Co classes magnetic alloy can be used as above-mentioned non-crystaline amorphous metal, it is contemplated that Master Cost, it is preferable that use Fe
Class magnetic alloy.
For example, Fe-Si-B alloys can be used as Fe class magnetic alloys, wherein, Fe is preferably 70~90atomic%, Si
It is preferably 10~30atomic% with B sums.The content of the Fe metals being included is higher, and saturation flux density is got over
Height, but in the case where the content of Fe elements is excessive, it is difficult to noncrystalline is formed, therefore in the present invention, Fe content is preferably
70~90atomic%.Also, when Si and B sums are when in the range of 10~30atomic%, the noncrystalline shape performance of alloy
It is the most outstanding.The corrosion resistance elements such as Cr, Co within 20atomi c% can be added in this ultimate constituent, with
Corrosion is prevented, also can be as needed comprising other a small amount of metallic elements, to assign other characteristics.
For example, crystallization temperature can be used to be 508 DEG C, and Curie temperature (Tc) is 399 DEG C of above-mentioned Fe-Si-B alloys.
But, other metals member that this crystallization temperature can be added with Si and B content or in addition to ternary alloy composition
Element and its content and change.
In the present invention, as needed, Fe-Si-B-Co based alloys can be used as Fe class non-crystaline amorphous metals.
On the other hand, the band of the thin plate formed by Fe class nano-crystal magnetic alloys can be used as above-mentioned thin plate magnetic piece
2。
Preferably, the alloy for meeting following mathematical expression 1 is used as Fe class nano-crystal magnetic alloys.
Mathematical expression 1
Fe100-c-d-e-f-gAcDdEeSifBgZh
In above-mentioned mathematical expression 1, A represent be selected from least one of Cu and Au element, D represent selected from Ti, Zr, Hf, V,
At least one of Nb, Ta, Cr, Mo, W, Ni, Co and rare earth element element, E represent selected from Mn, Al, Ga, Ge, In, Sn and
At least one of platinum family element element, Z represents that, selected from least one of C, N and P element, c, d, e, f, g and h are full respectively
Sufficient 0.01≤c of relational expression≤8at%, 0.01≤d≤10at%, 0≤e≤10at%, 10≤f≤25at%, 3≤g≤
12at%, 15≤f+g+h≤35at% number, as the area ratio of above-mentioned alloy structure, more than 20% by particle diameter be 50nm with
Under fine structure formed.
In above-mentioned mathematical expression 1, element A is used for the corrosion resistance for improving alloy, prevents the coarsening of crystalline particle, and improve
The magnetic such as the magnetic conductivity of iron loss or alloy.If the content of element A is very few, it is difficult to the effect for obtaining the coarsening for suppressing crystal grain.
If on the contrary, the content of element A is excessive, magnetic can be caused to deteriorate.It is therefore preferred that the content of element A is 0.01 to 8at%
In the range of.D elements are to effective elements such as the homogenization of crystal grain diameter and magnetostrictive reductions.Preferably, D elements
Content is in the range of 0.01 to 10at%.
E elements are the soft magnetism and the effective element of corrosion proof improvement to alloy.The content of E elements is preferably 10at%
Below.The element of the amorphization of alloy when Si and B is composition manufacture magnetic piece.Si content is preferably 10 to 25at%'s
In the range of, B content is preferably in the range of 3 to 12at%.Also, alloy can also include Z elements, as except Si
And the amorphization component of the alloy outside B.In this case, it is preferable that total content of Si, B and Z element 15 to
In the range of 35at%.Preferably, microstructure is formed as follows：That is, the crystal grain for making particle diameter be 5 to 30nm is made in alloy structure
Structure for area than the scope presence with 50 to 90%.
Further, it is possible to which Fe-Si-B-Cu-Nb alloys are used as into the Fe class nanocrystalline magnetics used in above-mentioned thin plate magnetic piece 2
Property alloy, in this case, Fe are preferably 73~80at%, Si and B's and preferably 15~26at%, Cu and Nb's and preferred
For 1~5at%.This compositing range can be such that the non-crystaline amorphous metal being made with band form comes easily by heat treatment described later
Separate out as the crystal grain of nanometer shape.
As shown in figure 4, for example, can be by polyethylene terephthalate (PET) film, polyimide film, polyester film, poly-
The resin films 11 such as the fluorine type resin films such as diphenyl sulfide (PPS) film, polypropylene (PP) film, polytetrafluoroethylene (PTFE) (PTFE) are used as above-mentioned protection
Film 1, said protection film 1 is attached to the one side of thin plate magnetic piece 2 by the first tack coat 12.
Also, use 1 to 100 μm of diaphragm 1, it is preferable that the diaphragm 1 in the range of 10~30u m can be used, more
Preferably, using the diaphragm 1 of 20um thickness.
Diaphragm 1 used in the present invention is when being attached to the one side of amorphous band piece 2, in the first tack coat 12
Another side removes the mould release membrance 4a in order to protect the first tack coat 12 and adhere to and adhered to.
Also, as shown in figure 5, for example, as two-sided tape 3, using by polyethylene terephthalate (PET,
Polyethylene Terephthalate) formation of the fluorine type resin film such as film base material 32, and in the both sides of above-mentioned two-sided tape 3
Face forms the second tack coat 31 and the 3rd tack coat 33, the lateral surface of the second tack coat 31 and the 3rd tack coat 33 be attached with from
Type film 4.Above-mentioned mould release membrance 4 forms as one when manufacturing two-sided tape 3, and the quilt when shielding piece 10 is attached into electronic equipment
Peel off and remove.
In order to which multiple amorphous band pieces 21~26 shown in Fig. 3 are bonded with each other, be inserted in amorphous band piece 21~26 it
Between two-sided tape 3a~3f used after the mould release membrances 4 of two sides, 4b is removed.
Two-sided tape 3,3a~3f can be applied to the type as described above with base material, can also be applied to no base
Material and only by tack coat formed without type of substrate.The feelings for the two-sided tape 3a~3f being inserted between amorphous band piece 21~26
Under condition, consider from filming aspect, preferably use no type of substrate.
Above-mentioned first tack coat 12, the second tack coat 31 and the 3rd tack coat 33 can use such as acrylic compounds bonding
Agent, can also use other kinds of binding agent certainly.
The two-sided tape 3 that thickness is 10um, 20um, 30um can be used, the thickness of above-mentioned two-sided tape 3 is preferably
10um。
Thin plate magnetic piece 2 used in above-mentioned shielding piece 10 can use the magnetic that such as every thickness is 15 to 35um
Piece.In this case, if treatment process after considering the heat treatment of thin plate magnetic piece 2, preferably, by thin plate magnetic piece 2
Thickness be set as 25 to 30um.The thickness of band is thinner, is produced when being handled after the heat treatment because of slight impact
The fracture phenomenon of band.
On the other hand, used when the reception device of wireless charger is arranged at the battery cover 5 of portable terminal 100
When, as shown in FIG. 16 and 17, wireless charger is attached to screen with magnetic field shielding piece 10 by the second coil (receiving coil) 6
Cover piece 10 and use.In this case, the second coil 6 does not form resonance circuit, thus shielding piece 10 (will connect to the second coil
Take-up circle) 6 resonance circuits formed inductance produce influence.
In this case, magnetic field shielding piece 10 is played for blocking the wireless power signal from dispensing device to portable
The magnetic field shielding effect for the influence that terminal device 100 is produced, and Induced wireless electric power signal is played, it is received with high efficiency
The effect for the inductor that second coil 6 of device is received.
Thin plate magnetic piece 2 is separated into multiple shreds 20 by fragmentation processing, and multiple shreds 20 are preferably sized to number
Ten um~below 3mm.
In the case where thin plate magnetic piece 2 is separated into multiple shreds 20 through fragmentation processing, the inductance l values of magnetic piece
Decrement is more than magnetic resistance R decrement.If as a result, carrying out fragmentation processing, the second of reception device to thin plate magnetic piece 2
The quality factor (Q) of the resonance circuit of the formation of coil 6 can increase, so that power transmission efficiency increases.
Also, can be by reducing because of caused by vortex flow in the case that thin plate magnetic piece 2 is separated into multiple shreds 20
Loss, the heating problem of battery is prevented with this.
Especially, in the present invention, as shown in Figure 10, after fragmentation processing is carried out to thin plate magnetic piece 2, by such as scheming
Mode shown in 13 carries out lamination treatment, and a part for the first tack coat 12 and the second tack coat 31 is between multiple shreds 20
Gap 20a permeates, so that it is the binding agent for playing dielectric medium effect that multiple shreds 20, which separate (isolation),.
As a result, in the case where only carrying out fragmentation processing, shred 20 contacts with each other with mobile, shred 20 it is big
It is small to increase therewith, thus produce eddy current losses increase the problem of, but due to make by lamination treatment before shred 20 by
Dielectric medium is coated, it is thus possible to prevent this problem.
As shown in Fig. 2 the wireless charger magnetic field shielding piece 10a of the first embodiment of the present invention has following structure：
1 amorphous band piece 21 is used as thin plate magnetic piece, diaphragm 1 is bonded in the one side of above-mentioned thin plate magnetic piece, and above-mentioned
The another side of thin plate magnetic piece bonds mould release membrance 4 by two-sided tape 3.
Also, as shown in Fig. 3 second embodiment, in magnetic field shielding piece of the invention, in order to improve the product of the second coil 6
Prime factor (Q) and power transmission efficiency, can be laminated multiple amorphous band pieces 21~26 to be used as thin plate magnetic piece.
In wireless charger, in order to improve the efficiency of charger to greatest extent, power transmission dispensing device can be made
Using contributing to the permanent magnet with the matching of reception device (align).That is, with the first coil in dispensing device
The inside of (transmit coil) sets circular permanent magnet and set, and it is accurate that the reception device being positioned on dispensing device is carried out
Position permutation, and holding reception device makes its motionless.
Therefore, wireless charger magnetic field shielding piece not only needs shielding to transmit 100 to 150KHz with from dispensing device
Exchange (AC) magnetic field that the electric power of frequency is generated, in addition it is also necessary to direct current (DC) magnetic field that shielding is generated by above-mentioned permanent magnet.
But, the influence that above-mentioned direct current (DC) magnetic field is produced to magnetic field shielding piece 10 is even larger than exchange (AC) magnetic field to magnetic field
The influence that piece 10 is produced is shielded, thus generation makes thin shielding piece magnetic saturation, thus reduces it as the performance of shielding piece, or
Make the problem of power transmission efficiency drastically declines.
Thus, in the case where the dispensing device of wireless charger uses permanent magnet, it is contemplated that come by permanent magnet
The magnetically saturated number of plies is carried out, it is necessary to determine the amorphous band piece 21~26 being laminated.
Also, the saturation magnetic field of Fe class non-crystaline amorphous metals is more than the saturation magnetic field of nanometer crystal alloy.Thus, using by Fe classes
In the case of the amorphous band piece 21~26 of non-crystaline amorphous metal formation, 2 to 8 layers can be laminated to use, for instance, it is preferred that using 3
To 5 layers, to obtain high magnetic permeability.In this case, the inductance (that is, magnetic conductivity) of laminates is preferably from about 13 to 19uH.
Also, in the case where using the amorphous band piece 21~26 formed by nanometer crystal alloy, 4 to 12 layers can be laminated
To use, for instance, it is preferred that using 7 to 9 layers, to obtain high magnetic permeability.In this case, inductance (that is, the magnetic conductance of laminates
Rate) 13 are preferably from about to 21uH.
On the other hand, in the case where the dispensing device of wireless charger does not use permanent magnet, also it can use and adopt
The amorphous band piece of relatively small amount is compared with the situation of permanent magnet.
In this case, if using the amorphous band piece formed by Fe classes non-crystaline amorphous metal or nanometer crystal alloy, being capable of layer
Fold 1 to 4 layer to use, the inductance (that is, magnetic conductivity) of laminates is preferably from about 13 to 21uH.
Fig. 3 is shown to be laminated multiple as thin plate magnetic piece, for example, be laminated 6 layers of amorphous band piece 21~26 to use
Situation, inserted with multiple tack coats or two-sided tape 3a~3f between multiple amorphous band pieces 21~26.
That is, it needs to shred 20 separated when making fragmentation and lamination treatment maintains the position of separation, and it is thin to be filled in
Tack coat or two-sided tape 3a~3f are inserted between amorphous band piece 21~26 by the mode of the gap 20a between piece 20
Row stacking.
10~10b of magnetic field shielding piece of the present invention is generally in the quadrangle shape of the rectangle or square corresponding with battery
Shape, but also can be in that the polygonals such as pentagon are circular or oval and partly combination rectangular shape and circle are formed in addition
Shape, it is preferable that the shape at the position of magnetic field shielding as needed, to have shape corresponding thereto.
Also, in the magnetic field shielding piece of the present invention, wireless charger includes in the central portion of the first coil of dispensing device
In the case of permanent magnet, in order to prevent from shielding the phenomenon that piece magnetizes (saturation) by the magnetic field of permanent magnet, as shown in Figure 6
3rd embodiment magnetic field shielding piece 10c, can be molded with the annular form corresponding with the second coil of reception device.
The magnetic field shielding piece 10c of 3rd embodiment is in the second coil in a certain shape in quadrangle, circle, ellipse
When, corresponding thereto, in a certain shape in quadrangle, circle, ellipse.In this case, it is preferable that magnetic field shielding
Piece 10c width is more than width about 1~2mm of the second coil 6.
The magnetic field shielding piece 10c of 3rd embodiment can have upper side be attached with annular diaphragm 1a it is annular thin
Plate magnetic piece 2b is attached to the structure of mould release membrance 4 by the two-sided tape 30 of annular.
Preferably, annular above-mentioned magnetic field shielding piece 10 uses the quadrangle with the area more than magnetic field shielding piece 10c
The mould release membrance 4 of shape, so as to easily be peeled off from mould release membrance 4.
Hereinafter, reference picture 7, the manufacture method to the magnetic field shielding piece of the present invention is illustrated.
First, manufactured using the rapid solidification method (RSP) by melt spinning by non-crystaline amorphous metal or nanometer crystal alloy shape
Into amorphous band 2a after (step S11), cut with defined length, and be laminated into lamellar form, so as to hold
The post processing (step S12) changed places after being heat-treated.
In the case that amorphous band 2a is non-crystaline amorphous metal, manufactured using the rapid solidification method (RSP) by melt spinning
By Fe class amorphous bands, below the 30um for example formed by Fe-Si-B or Fe-Si-B-Co alloys ultrathin amorphous band, and
The amorphous band of stacking is carried out within the temperature range of 300 DEG C to 600 DEG C 30 minutes to 2 hours without magnetic-field heat treatment, with
Just required magnetic conductivity (step S13) is obtained.
In this case, for heat-treating atmosphere, even if amorphous band 2a Fe contents are high, also do not aoxidizing
Carry out, thus without being carried out in atmosphere furnace, can be also heat-treated in an atmosphere in temperature range.Also, even in oxygen
Change and be heat-treated in atmosphere or blanket of nitrogen, as long as identical temperature conditionss, then the magnetic conductivity of amorphous band does not just have yet
Substantial difference.
Heat treatment temperature as described above is less than in the case of 300 DEG C, and the magnetic conductivity higher than required magnetic conductivity is presented, and
The problem of in the presence of longer heat treatment time is needed, heat treatment temperature as described above is more than in the case of 600 DEG C, due to overheat
Processing so that magnetic conductivity is decreased obviously, causes the problem of required magnetic conductivity can not be presented in presence.Generally, heat treatment temperature is worked as
, it is necessary to longer processing time when low, on the contrary, when heat treatment temperature is high, processing time will be shortened.
Also, amorphous band 2a is by the case that nanometer crystal alloy is formed, utilizing the rapid solidification method by melt spinning
(RSP) manufacture by Fe class amorphous bands, below the 30um for example formed by Fe-Si-B-Cu-Nb alloys ultrathin amorphous ribbon
Material, and within the temperature range of 400 DEG C to 700 DEG C the band piece of stacking is carried out 30 minutes to 2 hours without magnetic-field heat treatment,
To obtain required magnetic conductivity, nanocrystalline nanocrystalline band (step S13) is thus molded into.
In this case, the Fe of heat-treating atmosphere content be more than 70at%, if therefore be heat-treated in an atmosphere,
It can then aoxidize, this is not preferred in visual aspects, it is therefore preferred that being carried out in blanket of nitrogen.But, even in oxidizing atmosphere
It is middle to be heat-treated, as long as identical temperature conditionss, then the magnetic conductivity of thin slice is also just without substantial difference.
In this case, heat treatment temperature be less than 400 DEG C in the case of, do not generate sufficiently it is nanocrystalline, lead to not obtain
Required magnetic conductivity is obtained, and there is the problem of needing longer heat treatment time, heat treatment temperature is more than in the case of 700 DEG C,
In the presence of due to Overheating Treatment, the problem of magnetic conductivity is decreased obviously.Preferably, when heat treatment temperature is low, it is necessary to longer processing
Time, on the contrary, when heat treatment temperature is high, processing time will be shortened.
Also, the present invention amorphous band 2a using thickness in the range of 15~35um, amorphous band 2a magnetic conductivity with
The thickness of band is increased in proportion to.
Especially, for above-mentioned amorphous band, as the heat treatment progresses, fragility becomes strong, so as to be carried out in subsequent handling
Fragmentation can be easily formed during fragmentation processing.
Then, using the number of plies of 1 or required multilayer the amorphous band 2a being heat-treated, it is two-sided to be attached to
Implement fragmentation processing in the state of adhesive tape 3, the side of above-mentioned two-sided tape 3 is attached with diaphragm 1, above-mentioned two-sided tape 3
Opposite side is attached with mould release membrance 4 (step S14).
In above-mentioned fragmentation processing, for example, stack gradually diaphragm 1, amorphous band 2a, two-sided tape 3 and mould release membrance 4
Laminates 100 by the first fragmentation device 110 and the second fragmentation device 120, amorphous band 2a is separated into multiple
Shred 20.In this case, multiple shreds 20 of separation will be maintained by the first tack coat 12 and second for being bonded in two sides
Tack coat 31 is come the state that separates.
As shown in figure 8, for example, workable first fragmentation device 110 can include：Metallic roll 112, outside is formed with
Multiple concavo-convex 116；And rubber roll 114, configured opposite to each other with metallic roll 112.As shown in figure 9, the second fragmentation device 120 can
Including：Metallic roll 122, outside is provided with multiple spherical balls 126；And rubber roll 124, matched somebody with somebody in the mode opposite with metallic roll 122
Put.
Like this, if making laminates 100 by the first fragmentation device 110 and the second fragmentation device 120, such as Figure 10
Shown, amorphous band 2a is separated into multiple shreds 20, and the generation gap 20a between shred 20.
Amorphous band 2a multiple shreds 20 are formed with the size in the range of tens of um~3mm, thus by making demagnetization
Field increases to remove magnetic hystersis loss, with the uniformity for the magnetic conductivity for improving thin slice.
Also, amorphous band 2a can reduce the surface area of shred 20 by fragmentation processing, thus prevent because of exchange
Heating problem caused by magnetic field and the vortex flow (Eddy Current) that generates.
The laminates 200 handled through fragmentation there are gap 20a between shred 20, if moisture is to above-mentioned gap 20a
Infiltration, then amorphous band will be oxidized, cause the degraded appearance of amorphous band, and decline shielding properties.
Also, in the case of only carrying out fragmentation processing, shred 20 contacts with each other with mobile, to increase shred 20
Size, it is possible to the problem of producing eddy current losses increase.
Especially, the above-mentioned laminates 200 handled through fragmentation are when carrying out fragmentation processing, it is possible to occur the table of thin slice
The uneven phenomenon in face is, it is necessary to the stabilisation of the band handled through fragmentation.
Therefore, in the laminates 200 handled through fragmentation, the gap 20a between shred 20 is filled with binding agent, and in fact
It is applied to planarization, slimming and stabilized lamination process (step S15).As a result, moisture penetration can be prevented, and pass through
Coat all faces of shred 20 with binding agent to be separated from each other shred 20, to reduce vortex flow.
As shown in figure 11, the laminater 400,500 for above-mentioned lamination process can use roll-in type, above-mentioned roll-in
Type is made up of the first pressure roller 210 and the second pressure roller 220, and the laminates 200 that above-mentioned first pressure roller 210 handles fragmentation lead to
Cross, above-mentioned second pressure roller 220 by with the first pressure roller 210 separate predetermined distance in the way of configure, as shown in figure 12, can use by
The hydraulic type that bottom pressure-producing part 240 and top pressure-producing part 250 are constituted, above-mentioned top pressure-producing part 250 is with along vertical
The moveable mode in direction is configured at the upside of bottom pressure-producing part 240.
If at a temperature of normal temperature condition or 50 to 80 DEG C, after the laminates 200 of heating fragmentation processing, being passed to layer
Pressure device 400,500, then be pressurized, a part of binding agent stream of the first tack coat 12 with the first tack coat 12 of diaphragm 1
Enter gap 20a, while as two-sided tape 30 is pressurized, a part of binding agent of the second tack coat 31 flows in gap 20a
And sealing off gap 20a.
In the case, the thermoplasticity deformed when can be by deformable binding agent when being pressurizeed under normal temperature condition or heating
Binding agent is used as the first tack coat 12 and the second tack coat 31.
Also, the thickness of the first tack coat 12 and the second tack coat 31 is preferably more than the 50% of thickness of amorphous strip, with
Just it is sufficient filling with the gap 20a between multiple shreds.
Also, interval between the first pressure roller 210 and the second pressure roller 220 and when top pressure-producing part is in the shape declined
Between top pressure-producing part 250 and bottom pressure-producing part 240 during state be preferably spaced the 50% of the thickness of laminates 200 with
Under, so that the binding agent of the first tack coat 12 and the second tack coat 31 can flow into gap 20a.
In the present invention, as long as the crimping and fragmentation processing of laminates 100,200 can be carried out, then it can just use
Any device.
If above-mentioned lamination process terminates, as shown in figure 13, electro-magnetic wave absorption piece 10 of the invention has following structure：
Amorphous band 2a is separated into the state of multiple shreds 20, and the first tack coat 12 and the second tack coat 31 partly fill thin respectively
Gap 20a between piece 20, to prevent amorphous band 2a oxidation and movement.
Finally, the above-mentioned magnetic field shielding piece 10 being laminated is for the size needed for the place of electronic equipment and purposes
Processing is stamped with shape, so as to realize commercialization (step S16).
In the present invention, as shown in figure 3, in the case that 6 amorphous band pieces 21~26 of stacking are used as thin plate magnetic piece,
Before being laminated, including diaphragm 1 and mould release membrance 4 carry out the thickness with 212um, if being laminated, and are carried out with 200um thin
Type.
In above-described embodiment, exemplified with the side that 1 diaphragm 1 is attached to magnetic piece 2, to carry out fragmentation and lamination
The situation of processing, but if by fragmentation treatment process, it is possible to be damaged diaphragm 1.It is therefore preferred that in protection
Another diaphragm for protecting diaphragm 1 is adhered on the top of film 1, come after carrying out treatment process, at the end of processing, to table
The diaphragm in face is peeled off and removed.
(humidity measurement)
At 85 DEG C of temperature and 85% damp condition, to the magnetic field shielding piece 10 of the invention that obtains in the above-described manner and broken
Without the humidity measurement for the progress 120 hours of laminates 200 for being laminated process after pieceization processing.
As a result, as shown in figures 14a, in the case of the laminates 200 for only having carried out fragmentation processing, it is known that work as amorphous ribbon
When material is in the state for being separated into multiple shreds, moisture is to the gap penetration between shred, so that amorphous band is aoxidized, it is thus outer
Sight changes, and shown in Figure 14 b, it is known that the outward appearance of magnetic field shielding piece 10 of the invention does not change.
In the magnetic field shielding piece of the present invention, the foreign material as shown in Figure 15 a and Figure 15 b can be regard as thin plate magnetic
Piece.
As shown in fig. 15 a, thin plate magnetic piece 35 can be in that tack coat 35c is inserted in into the first magnetic piece 35a and the second magnetic
Property piece 35b between there is high magnetic permeability, above-mentioned second magnetic piece 35b tools come the mixed style that combines, above-mentioned first magnetic piece 35a
There is the low magnetic permeability of the magnetic conductivity less than above-mentioned first magnetic piece.
The outstanding slope of the above-mentioned amorphous band piece formed by non-crystaline amorphous metal or nanometer crystal alloy, soft magnetism characteristic can be applicable
Alloy (permalloy) piece or molybdenum permalloy powder (MPP, Moly Permalloy Powder) piece etc., are not used as above-mentioned
One magnetic piece 35a.
Can be by by the magnetic and resin of the high magnetic permeabilities such as amorphous powdered alloy, soft magnetic powder, alsifer
The polymer sheet of formation is used as the second magnetic piece 35b.
In this case, it is preferable that amorphous powdered alloy have be selected from comprising Fe-Si-B, Fe-Si-B-Cu-Nb,
Constituent in Fe-Zr-B and Co-Fe-Si-B group, and use comprising more than one as the non-of amorphous alloy
Peritectic alloy powder.
Also, in the case that portable terminal uses near-field communication (NFC) and wireless charging function simultaneously, mixed type thin plate
In magnetic piece 35, it is laminated amorphous band piece and the low ferrite sheet of frequency dependence to be used as the first magnetic piece and the second magnetic piece
35b, thus uses ferrite sheet with magnetic field shielding in near-field communication, and is used as wireless charger, using amorphous band piece, comes
It can solve simultaneously.
Especially, in the case that portable terminal uses near-field communication and wireless charging function simultaneously, as illustrated in fig. 15b, mix
In mould assembly thin plate magnetic piece 35, also can central portion by the amorphous band piece of required area be used as the first magnetic piece 35a, and
And, by above-mentioned first magnetic piece 35a whole outside annular the second magnetic piece 35b and iron for coating the first magnetic piece 35a
Oxysome ring is combined.That is, with the annular state formation ferrite small relative to noncrystalline piece magnetic conductivity, to be configured at noncrystalline piece
Periphery.
On the other hand, below, reference picture 16 and Figure 17, are applied to wirelessly the magnetic field shielding piece of the present invention as described above
The structure of the reception device of charger is illustrated.
Figure 16 is vertical suitable for the decomposition of the structure of the reception device of wireless charger for the magnetic field shielding piece for representing the present invention
Body figure, Figure 17 is arranged on battery cover with reception device for expression Figure 16 wireless charger and is combined with portable terminal
State exploded perspective view.
Reference picture 16, if the magnetic field shielding piece of the present invention is applied to the reception device of wireless charger, in magnetic field shielding
The top of the diaphragm of piece 10, the second coil 6 of the receiving side of wireless charger is adhered to using two-sided tape 30b, in magnetic field
The bottom of piece 10 is shielded, adheres to coating material in the tack coat 33 for the two-sided tape for removing mould release membrance 4 and exposing.
Also, it can also remove the mould release membrance 4 of magnetic field shielding piece 10, and adhere to the of wireless charger in two-sided tape 3
Two coil 6, the assemble method of above-mentioned antenna is replaced with this.
As shown in figure 17, in the assembly of the second coil 6 and magnetic field shielding piece 10 as described above, if in portable terminal
After the battery cover 5 of equipment 100 is adhered to using two-sided tape 30a, battery cover 5 is combined with portable terminal 100, then
Magnetic field shielding piece 10 is used with the form for covering battery 7.
The installation site of magnetic field shielding piece 10 as described above is in addition to it can be configured at the outside of battery, additionally it is possible to
Well-known other method configuration.
Above-mentioned second coil 6 can use the coil with well-known any structure.For example, as shown in figure 16, the
Two coil 6 also can be in the substrate 6b formed by synthetic resin such as polyimides (PI), in quadrangle, circle, ellipse
The spiral coil 6a of some shape formed.
In above-mentioned second coil 6, for example, spiral coil 6a is directly formed at by two-sided tape with branch mode, will
A bonding sheet for playing insulating barrier effect is mounted to membrane structure, and synthetic resin substrate 6b and two-sided tape 30b is replaced with this.
In this case, spiral coil 6a wirelessly receives electric power, thus can also be wound into normal coil
Film inductor form, and be attached to substrate and use.
On the other hand, in portable terminal 100, the inside of body is included the spiral coil 6a of the second coil 6
The ac voltage rectifier of generation is the rectifier (not shown) of DC voltage, and the DC voltage of rectification is filled in into battery (two
Primary cell) 7.
As described above, the assembly of the second coil 6 and magnetic field shielding piece 10 is arranged at the battery of portable terminal 100
In the case of lid 5, by noncontact (wireless) mode portable terminal can be made to be produced when realizing wireless charging function
Raw AC magnetic field, to prevent from producing portable terminal 100 influence, and absorbs required during execution wireless charging function
Electromagnetic wave.
That is, magnetic field shielding piece 10 of the invention is provided with the magnetic for the multilayer for handling through fragmentation and being separated into multiple shreds 20
Piece 2, to rise Q values, increases power transmission efficiency, and reduces the surface area of band by fragmentation processing, to prevent
Heating problem caused by the vortex flow (Eddy Current) only generated by AC magnetic field.
As a result, blocking the circuit board and battery of the magnetic flux produced from the first coil of dispensing device and portable terminal
(secondary cell) 7 grade is interconnected, to suppress heating.
On the other hand, Figure 18 is to show near-field communication (NFC, Near field communicat ions) antenna and wireless
The top view for the double-antenna structure that charger is formed as one with antenna using flexible printed circuit board (FPCB).
Preferably, used for performing the double antenna 40 of near-field communication and wireless charging function simultaneously with two sides substrate knot
The flexible printed circuit board of structure is realized.But, double antenna of the invention is not limited thereto, the knot can with other forms
Structure.
In reference picture 18, double antenna 40, for example, being formed simultaneously with the He of near-field communication aerial coil 41 on the top of substrate 49
Wireless charger aerial coil 43.Aforesaid substrate 49 can be used such as two-sided tape, the He of near-field communication aerial coil 41
Wireless charger is formed at cohesive substrate 29 with aerial coil 43 with branch mode.
Due to frequency band of the frequency band higher than wireless charger aerial coil 43 of near-field communication aerial coil 41, thus along
The periphery of substrate 49, conductive pattern is formed with the rectangular shape of fine line width, and wireless charger is needed with aerial coil 43
Electric power is transmitted, and is used below the frequency band of near-field communication, thus is formed with the inner side of near-field communication aerial coil 41 by width
Formed in the line width of the line width of near-field communication aerial coil 41 and in the conductive pattern of generally elliptical shape.
In above-mentioned double antenna 40, extended in near-field communication aerial coil 41 and wireless charger with the side of aerial coil 43
The protuberance of the substrate 49 of formation is each configured with a pair of terminal 41a, 41b, 43a, 43b.
The out conductor of above-mentioned near-field communication aerial coil 41 is directly connected with the first terminal 41a, above-mentioned near-field communication day
The inside cord of line coil 41 is connected by terminal connection with pattern (not shown) with Second terminal 41b, and above-mentioned terminal connection is used
Pattern is formed at the back side of substrate 49 by conductive through hole 45a, 45b.
Similarly, wireless charger passes through terminal connection pattern (not shown) and the 3rd with the out conductor of aerial coil 43
Terminal 43a is connected, and above-mentioned terminal connection is formed at the back side of cohesive substrate 29, nothing with pattern by conductive through hole 47a, 47b
Line charger is connected by terminal connection with the inside cord of aerial coil 43 with pattern (not shown) with forth terminal 43b, on
State the back side that terminal connection is formed at substrate 49 with pattern by conductive through hole 47c, 47d.
Preferably, for example, forming photosensitive imaging welding resistance (PSR, Photo Solder on the surface of aforesaid substrate 49
) etc. Resist it is used for the diaphragm for protecting aerial coil pattern.
In the case of using near-field communication and wireless charging function simultaneously, as described above, can use using Figure 15 a and figure
The shielding piece of 15b mixed type magnetic piece.
Hereinafter, the present invention is described in more detail by embodiment.But, following embodiment only belongs to this hair
Bright illustration, the scope of the present invention is not limited to this.
(1~embodiment of embodiment 4,1~comparative example of comparative example 3)
(electrical characteristics of magnetic field shielding piece)
In the situation (comparative example 1) that magnetic field shielding piece is not used, make respectively using 1 amorphous not being heat-treated
The magnetic field shielding piece (comparative example 2) of band piece, (compared using the magnetic field shielding piece for 1 nanocrystalline strip piece being heat-treated
Example 3), 1 nanocrystalline strip piece being heat-treated, the magnetic field shielding piece (embodiment 1) for carrying out fragmentation processing, carry out hot place
2 nanocrystalline strip pieces of reason, the magnetic field shielding piece (embodiment 2) for carrying out fragmentation processing, 3 be heat-treated are nanocrystalline
Band piece, the magnetic field shielding piece (embodiment 3) for carrying out fragmentation processing, 4 nanocrystalline strip pieces being heat-treated, progress are broken
The magnetic field shielding piece (embodiment 4) of pieceization processing.
Thickness is made it is suitable for shielding the amorphous band of piece using the rapid solidification method (RSP) based on melt spinning
25um by Fe73.5Cu1Nb3Si13.5B9After the amorphous band of alloy formation, the form of flakiness is cut, will be in 580 DEG C of temperature
Degree, N21 hour be inserted in without magnetic-field heat treatment come the amorphous band piece that obtains is carried out under atmospheric condition and uses poly- terephthaldehyde
Diaphragm and the use of the thickness of polyethylene terephthalate base material is 10um that the thickness of sour glycol ester base material is 10um
Two-sided tape (in addition to mould release membrance) between prepare laminates, and fragmentation processing unit using Fig. 8 and Figure 11
Laminater implements fragmentation and lamination treatment.When being laminated the nanocrystalline strip piece of more than 2, it is inserted between thin slice
Two-sided tape as the two sides of polyethylene terephthalate film formed acrylic adhesive layer, used thickness
For 12um's.
When the shielding piece that will be made be used for wireless charger when, in order to understand to the second coil produce influence, as with
The second coil that shielding piece is combined, i.e., as coil is determined, used the circle that inductance is 12.2uH and resistance is 237m Ω
Planar coil.After LCR tester (LCR meter) is connected with measure coil, it is located at measure coil
Shield on piece, and the regular hexahedron of the weight with about 500g is placed on measure coil, so as to apply defined pressure
In the state of, the setting value of LCR tester is set as after 100kHz, 1V, inductance (Ls), magnetic resistance is determined
(Rs), impedance (Z), the quality factor (Q) of coil, and be presented in following table 1.
Table 1
It was found from above-mentioned table 1, in the case of the shielding piece (comparative example 2) of the not thermally treated band of use, magnetic conductivity is low,
Inductance (Ls) value of second coil is small, and because the resistance of band is low and makes magnetic resistance (Rs) value big, thus it is used as the quality of coil
The Q values of factor are substantially low.
In the case of shielding piece (comparative example 3) using thermally treated band piece, magnetic conductivity is uprised so that the second coil
Inductance (Ls) value become big, and the resistance of band piece is become by being created on the nanocrystalline microstructures of band piece by heat treatment
Greatly so that magnetic resistance (Rs) value be significantly less than it is thermally treated before, thus quality factor (Q) value of coil and it is thermally treated before phase
Than rising significantly.
Also, the shielding piece (embodiment 1) of fragmentation (Flake) is carried out using thermally treated band piece and to band piece
In the case of, too big change does not occur for inductance (Ls) value of the second coil, and magnetic resistance (Rs) value is not with carrying out fragmentation processing
When compared to substantially it is low, it can thus be appreciated that the Q values of whole coil more rise.
Especially, compared with Example 1, increase with the stacking number of band piece, quality factor (Q) value of coil is also with big
Width rises.
If as described above, the shielding piece of the present invention is used for into wireless charger, the inductance (Ls) and Q values of the second coil become
Height, and as magnetic resistance (Rs) value reduces, can make from the magnetic flux of the dispensing device transmission of the second coil of wireless charger
Efficiency of transmission increases.
(5~embodiment of embodiment 8, comparative example 1)
(power transmission efficiency of magnetic field shielding piece)
Embodiment 5 is to the magnetic field shielding piece of embodiment 7 to be made for four sides with embodiment 1 to the identical method of embodiment 4
Shape shape, simply, the quantity for being laminated in the nanocrystalline strip piece of thin slice is changed to 6,9,12, the magnetic field screen of embodiment 8
Cover in piece, by the magnetic field shielding piece (quantity of nanocrystalline strip piece of embodiment 6：6) shape be processed as and the second coil
Shape identical annular, has differences in this.
As shown in figure 19, for comparative example 1 (when magnetic field shielding piece is not used), embodiment 5 to the magnetic field of embodiment 8
Piece is shielded, placing thickness on the top of the dispensing device 8 of wireless charger is 0.5mm lining paper 9, and is put in lithium ion battery 7
Put and be provided with the state of the reception device of the coil 6 of magnetic field shielding piece 10 and second, determine the First Line to dispensing device (Tx) 8
Voltage (V) and electric current (mA) that the voltage (V) applied and electric current (mA) and the second coil 6 of reception device (Rx) are received are enclosed,
Following table 2 is recorded in, and power transmission efficiency is calculated based on this.
Table 2
In the past, in the case that the dispensing device of wireless charger includes permanent magnet, due to the direct current based on permanent magnet
Magnetic field, only when the thickness of the shielding piece using ferrite sheet is more than 0.5T, can be optimal as shielding piece progress
Wireless charging works.
With reference to above-mentioned table 2, if embodiment 5 is to described in embodiment 7, shielding piece is that the shape of nanocrystalline strip piece is in four sides
In the case of shape, it is known that want to obtain the electric power biography almost identical with the reception device of the comparative example 1 of unused any shielding piece
Defeated efficiency, it is necessary to be laminated the nanocrystalline strip piece of 12 or so.
Also, as described in embodiments of the invention 7, in the case of using 12 nanocrystalline strip pieces, due to magnetic conductivity
Height, thus when being the shielding piece of conventional use ferrite sheet, within the 0.3T less than 0.5T, also present and ferrite
Or polymer sheet identical characteristic.
Especially, as described in example 8 above, by the magnetic field shielding piece (quantity of nanocrystalline strip piece：6) shape be made with
In the case of the shape identical annular of second coil, it is known that although the quantity of used nanocrystalline strip piece is embodiment 7
(the quantity of nanocrystalline strip piece：12) 1/2, the power transmission efficiency almost identical with embodiment 7 is also presented.
As a result, as described in example 8 above, the shape of magnetic field shielding piece is made into the shape identical ring with the second coil
In the case of shape, the quantity of used nanocrystalline strip piece can be reduced to 1/2, to reduce manufacturing cost, and by product
Thickness more tend to slimming.
For this result, though the shape of the second coil of change reception device, and corresponding thereto by magnetic field
The shape of shielding piece is changed to other shapes, and almost identical result is also presented.
(temperature characterisitic)
The magnetic field shielding piece of above-described embodiment 8 is set as shown in figure 19, and in 30 minutes to 4 hours 30 minutes fill
In the electric time, the temperature of the nanocrystalline strip piece of battery and magnetic field shielding piece was determined in units of 30 minutes, and will thus be obtained
Result be presented on following table 3.
Table 3
| Charge the working time | Battery temperature (DEG C) | Band piece temperature (DEG C) |
| 0.5 hour | 29.5 | 30 |
| 1.0 hour | 30 | 30 |
| 1.5 hour | 30.5 | 30.5 |
| 2.0 hour | 30.5 | 30.5 |
| 2.5 hour | 30.5 | 31 |
| 3.0 hour | 30.5 | 31 |
| 3.5 hour | 30.5 | 31 |
| 4.0 hour | 30.5 | 31 |
| 4.5 hour | 30.5 | 31 |
Generally, when carrying out wireless charging, if the temperature of the grade secondary cell of lithium ion battery 7 reaches more than 40 DEG C of temperature,
Then it is possible to produce safety problem.
In the case that the shielding piece of the present invention is applied into wireless charger, it is known that as described in above-mentioned table 3, even if through
The time is spent, the temperature of battery and shielding piece does not also rise, and maintains 30 DEG C of temperature or so, to ensure security.
(embodiment 9)
It is 25um by Fe that thickness, which is made using the rapid solidification method (RSP) based on melt spinning,67B14Si1Co18Alloy
After the amorphous band of formation, the form of flakiness is cut, and is obtained respectively in 487 DEG C of temperature, 459 DEG C of temperature, 450 DEG C of temperature
The lower amorphous band piece obtained without magnetic-field heat treatment for carrying out 1 hour of degree.Afterwards, the amorphous band obtained thermally treated
Diaphragm and use poly terephthalic acid second that it is 10um using the thickness of polyethylene terephthalate base material that piece, which is inserted in,
The thickness of terephthalate substrate uses Fig. 8's to prepare laminates between 10um two-sided tape (in addition to mould release membrance)
Fragmentation processing unit and Figure 11 laminater implements fragmentation and lamination treatment.
Now, according to different heat treatment temperature, it is used for the amorphous band piece of laminates using 1 to 9 respectively, in amorphous
Insert two-sided tape between band piece, according to each amorphous band piece different heat treatment temperature measuring inductance (magnetic conductivity) and fill
Electrical efficiency, and it is presented on following table 4.
Table 4
At a temperature of 487 DEG C, 459 DEG C and 450 DEG C, amorphous band piece is carried out respectively 1 hour without magnetic-field heat treatment, its
As a result, the inductance (magnetic conductivity) of each thin slice is 13uH, 15uH, 18uH, it follows that with the increase of heat treatment temperature
The result of reduction.
The inductance (magnetic conductivity) that the charge efficiency of the different induction of each thin slice is heat-treated at a temperature of 459 DEG C is
Highest is presented in the case of 15uH, as the quantity of the amorphous band piece of stacking from 1 increases to 8, charge efficiency is also presented
Increased tendency is proportional, in the case of stacking substantially 4, the phenomenon of saturation is generated, the situation more than 8
Under, charge efficiency presents the tendency of reduction.
(embodiment 10)
The different numbers of plies for the thin slice for estimating using above-mentioned inductance (magnetic conductivity) is 15uH amorphous band piece to be laminated are most
Big charge efficiency, and thus obtained result is presented on following table 5.
Above-mentioned maximum charge efficiency is the reception device of wireless charger, i.e., adjusted on the basis of the inductance value of the second coil
The time constant value of reception device, the value that efficiency is adjusted to be obtained in the state of maximum.
Table 5
With reference to table 5, efficiency increases according to the quantity of the amorphous band piece of stacking, when 4, and maximum charge efficiency is presented
For highest, i.e., 71.9%.
As described above, in the present invention, being handled by the fragmentation of amorphous band, to greatly reduce vortex flow (Eddy
Current lost caused by), thus prevent from producing the body and battery of portable terminal etc. magnetic field influence, and increase
The quality factor (Q) of second coil, outstanding power transmission efficiency is ensured with this.
Also, can be after the fragmentation processing of amorphous band, by crimping lamination treatment, with bonding in the present invention
Gap between shred of the agent to fill amorphous band, to prevent moisture penetration, and coats shred with binding agent (dielectric medium)
All faces so that shred mutually insulated (isolation), to reduce vortex flow, to prevent shielding properties from declining.
Especially, can be by the way that the shape for shielding piece be set as into the shape similar with receiver coil, to make in the present invention
With a small amount of nanocrystalline strip, with high power transmission efficiency, or equivalent power transmission efficiency is presented, and by thin slice
Thickness is reduced to below 0.3mm.
Also, in the present invention, fragmentation and lamination treatment can be performed successively in volume to volume method, come realize film into
Type, thus maintains original thickness of thin slice, and ensures high production rate, cheap manufacturing expense.
In the explanation of embodiment as described above, show that portable terminal is applicable the example of wireless charger, but
Samely, the present invention can be applied to provide in noncontact (wireless) mode to all portable electrics of wireless charging function
Sub- equipment.
More than, specific preferred embodiment is enumerated the present invention has shown and described, but the present invention is not limited to
Embodiment is stated, can without departing from the spirit of the invention within the scope be entered by general technical staff of the technical field of the invention
Row various changes and modifications.
Industrial applicability
The various portable electronics that the wireless charger of the present invention is applied to include portable terminal with magnetic field shielding piece are set
It is standby, by AC magnetic field and D.C. magnetic field produced when realizing wireless charging in noncontact (wireless) mode, to prevent to just
Take formula terminal device etc. and produce influence, and can be applied to help to absorb the wireless charging of electromagnetic wave required during wireless charging
The magnetic field shielding piece of device.
Claims (19)
1. a kind of wireless charger magnetic field shielding piece, it is characterised in that
Including：
At least one layer of thin plate magnetic piece, is formed by the amorphous band for being separated into multiple shreds,
Diaphragm, the one side of above-mentioned thin plate magnetic piece is bonded in by the first tack coat, and
Two-sided tape, the second tack coat is provided with above-mentioned two-sided tape one side, and above-mentioned two-sided tape is viscous by above-mentioned second
Layer is tied to be bonded in the another side of above-mentioned thin plate magnetic piece；
Gap between above-mentioned multiple shreds is filled by a part for above-mentioned first tack coat and the second tack coat, so that above-mentioned many
Individual shred mutually insulated.
2. wireless charger according to claim 1 magnetic field shielding piece, it is characterised in that
Above-mentioned thin plate magnetic piece includes：
First magnetic piece, with the first magnetic conductivity；
Second magnetic piece, is laminated in above-mentioned first magnetic piece, the second magnetic conductivity with less than the first magnetic conductivity；And
Tack coat, makes above-mentioned first magnetic piece and the second magnetic piece mutually bond, for filling the seam between above-mentioned multiple shreds
Gap.
3. wireless charger according to claim 2 magnetic field shielding piece, it is characterised in that
Above-mentioned first magnetic piece uses one kind in noncrystalline piece, ferrite sheet, permalloy piece, molybdenum permalloy piece；
Above-mentioned second magnetic piece uses the polymer sheet formed by magnetic and resin.
4. wireless charger according to claim 2 magnetic field shielding piece, it is characterised in that above-mentioned first magnetic piece is by non-
Crystalloid piece is formed, and above-mentioned second magnetic piece is formed by ferrite sheet.
5. wireless charger according to claim 1 magnetic field shielding piece, it is characterised in that
Above-mentioned wireless charger includes the reception of the wireless charger of permanent magnet with magnetic field shielding piece suitable for dispensing device
Device；
Above-mentioned thin plate magnetic piece is formed by Fe classes non-crystaline amorphous metal or nanometer crystal alloy, and by being laminated for 2 layers to 12 layers of amorphous ribbon
Material and the tack coat being inserted between be laminated amorphous band are formed.
6. wireless charger according to claim 1 magnetic field shielding piece, it is characterised in that
Above-mentioned wireless charger magnetic field shielding piece does not include connecing for the wireless charger of permanent magnet suitable for dispensing device
Receiving apparatus；
Above-mentioned thin plate magnetic piece is viscous between be laminated amorphous band by being laminated for 1 layer to 4 layers of amorphous band and being inserted in
Knot layer is formed.
7. wireless charger according to claim 1 magnetic field shielding piece, it is characterised in that
Above-mentioned two-sided tape includes：
Base material,
Second tack coat, is formed at the one side of above-mentioned base material, is bonded in the another side of thin plate magnetic piece, and
3rd tack coat, is formed at the another side of base material；
Above-mentioned second tack coat is filled in the gap between above-mentioned multiple shreds, forms integrated with above-mentioned first tack coat.
8. wireless charger according to claim 1 magnetic field shielding piece, it is characterised in that wireless charger magnetic field screen
Piece is covered in the corresponding shape of the second coil of reception device with being arranged at wireless charger.
9. wireless charger according to claim 1 magnetic field shielding piece, it is characterised in that above-mentioned thin plate magnetic piece is by Fe
Class non-crystaline amorphous metal is formed, at a temperature of 300 DEG C to 600 DEG C carry out 30 minutes~2 hours without magnetic-field heat treatment.
10. wireless charger according to claim 1 magnetic field shielding piece, it is characterised in that above-mentioned thin plate magnetic piece by
Nanometer crystal alloy is formed, at a temperature of 600 DEG C to 700 DEG C carry out 30 minutes~2 hours without magnetic-field heat treatment.
11. a kind of wireless charger manufacture method of magnetic field shielding piece, it is characterised in that including：
By adhering to diaphragm and its exposed surface on the two sides of the thin plate magnetic piece formed by least one layer of amorphous band
On be formed with the two-sided tape of mould release membrance, the step of to form laminates；
By carrying out fragmentation processing, the step of above-mentioned thin plate magnetic piece is divided into multiple shreds to above-mentioned laminates；With
And
By carrying out lamination treatment to the above-mentioned laminates for having carried out fragmentation processing, to realize the planarizations of laminates and slim
Change, while a part for the first tack coat for being arranged at said protection film and the second tack coat for being arranged at two-sided tape is filled
In the gap of above-mentioned multiple shreds, so that the step of above-mentioned multiple shred mutually insulateds.
12. the wireless charger according to claim 11 manufacture method of magnetic field shielding piece, it is characterised in that also include
Before above-mentioned laminates are formed, the step of being heat-treated to amorphous band.
13. the wireless charger according to claim 11 manufacture method of magnetic field shielding piece, it is characterised in that above-mentioned
The thickness of one tack coat and the second tack coat is more than the 50% of the thickness of above-mentioned amorphous band.
14. the wireless charger according to claim 11 manufacture method of magnetic field shielding piece, it is characterised in that above-mentioned thin
Plate magnetic piece is the mictomagnetism piece of the first magnetic piece and the second magnetic piece by bonding layer stackup, and above-mentioned first magnetic piece has
First magnetic conductivity, above-mentioned second magnetic piece has the second magnetic conductivity less than the first magnetic conductivity.
15. the wireless charger according to claim 14 manufacture method of magnetic field shielding piece, it is characterised in that above-mentioned
One magnetic piece is formed by noncrystalline piece, and above-mentioned second magnetic piece is formed by ferrite sheet or polymer sheet.
16. a kind of wireless charger reception device, for the dispensing device from wireless charger with way of electromagnetic induction to two
Primary cell is charged, and above-mentioned wireless charger reception device is characterised by,
Including：
Second coil, for receiving the wireless high-frequency signal transmitted with way of electromagnetic induction from above-mentioned dispensing device, and
Magnetic field shielding piece, is configured between above-mentioned second coil and secondary cell, for shielding because of above-mentioned wireless high-frequency signal
The magnetic field of generation, believes while above-mentioned second coil of guiding absorbs it for the wireless high-frequency needed for performing wireless charging function
Number；
Above-mentioned magnetic field shielding piece includes：
At least one layer of thin plate magnetic piece, is formed by the amorphous band for being separated into multiple shreds,
Diaphragm, the one side of above-mentioned thin plate magnetic piece is bonded in by the first tack coat, and
Two-sided tape, the second tack coat is provided with above-mentioned two-sided tape one side, and above-mentioned two-sided tape is viscous by above-mentioned second
Layer is tied to be bonded in the another side of above-mentioned thin plate magnetic piece；
Gap between above-mentioned multiple shreds is filled by a part for above-mentioned first tack coat and the second tack coat, so that above-mentioned many
Individual shred mutually insulated.
17. wireless charger reception device according to claim 16, it is characterised in that used in above-mentioned wireless charger
In reception device, above-mentioned second coil and near-field communication aerial coil are formed at the top of an insulated substrate simultaneously.
18. wireless charger reception device according to claim 17, it is characterised in that above-mentioned magnetic field shielding piece it is thin
Plate magnetic piece is the thin slice that is bonded by amorphous band piece and ferrite sheet by tack coat or by amorphous band piece and polymerization
The thin slice that thing piece is bonded by tack coat.
19. wireless charger reception device according to claim 17, it is characterised in that above-mentioned magnetic field shielding piece it is thin
Plate magnetic piece includes：
Amorphous band piece, the central portion of above-mentioned thin plate magnetic piece is configured at required area；And
The ferrite core of annular, in the outside cladding amorphous band piece of above-mentioned amorphous band piece.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20110138987 | 2011-12-21 | ||
| KR10-2011-0138987 | 2011-12-21 | ||
| PCT/KR2012/011256 WO2013095036A1 (en) | 2011-12-21 | 2012-12-21 | Magnetic field shielding sheet for a wireless charger, method for manufacturing same, and receiving apparatus for a wireless charger using the sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104011814A CN104011814A (en) | 2014-08-27 |
| CN104011814B true CN104011814B (en) | 2017-08-15 |
Family
ID=48668835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280062847.1A Active CN104011814B (en) | 2011-12-21 | 2012-12-21 | Magnetic field shielding piece and its manufacture method and wireless charger reception device |
Country Status (6)
| Country | Link |
|---|---|
| US (7) | US9252611B2 (en) |
| EP (1) | EP2797092B1 (en) |
| JP (2) | JP6283615B2 (en) |
| KR (1) | KR101399023B1 (en) |
| CN (1) | CN104011814B (en) |
| WO (1) | WO2013095036A1 (en) |
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-
2012
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Also Published As
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| KR101399023B1 (en) | 2014-05-27 |
| US11006553B2 (en) | 2021-05-11 |
| US20150123604A1 (en) | 2015-05-07 |
| US20160081237A1 (en) | 2016-03-17 |
| US9504194B2 (en) | 2016-11-22 |
| EP2797092B1 (en) | 2017-02-08 |
| JP6283615B2 (en) | 2018-02-21 |
| JP2018085516A (en) | 2018-05-31 |
| US10123467B2 (en) | 2018-11-06 |
| CN104011814A (en) | 2014-08-27 |
| US11337345B2 (en) | 2022-05-17 |
| EP2797092A1 (en) | 2014-10-29 |
| US20210185865A1 (en) | 2021-06-17 |
| US20160081239A1 (en) | 2016-03-17 |
| KR20130072181A (en) | 2013-07-01 |
| US20160081240A1 (en) | 2016-03-17 |
| JP2015505166A (en) | 2015-02-16 |
| US9252611B2 (en) | 2016-02-02 |
| US9930818B2 (en) | 2018-03-27 |
| US10010018B2 (en) | 2018-06-26 |
| WO2013095036A1 (en) | 2013-06-27 |
| US20160081238A1 (en) | 2016-03-17 |
| US20190045676A1 (en) | 2019-02-07 |
| EP2797092A4 (en) | 2015-10-07 |
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Commission number: 4W107677 Conclusion of examination: Declare that the patent right for invention No. 201280062847.1 is partially invalid, and continue to maintain the validity of the patent right on the basis of claims 1-15 submitted by the patentee on December 17, 2018. Decision date of declaring invalidation: 20190304 Decision number of declaring invalidation: 39186 Denomination of invention: Magnetic field shielding sheet, manufacturing method thereof and receiving device for Wireless charger Granted publication date: 20170815 Patentee: AMOSENSE Co.,Ltd. |